FR3076503A1 - VEHICLE SEAT ASSEMBLY WITH VIBRATION DEVICES THROUGH CONCENTRIC SUBASSEMBLIES - Google Patents

Abstract

A vehicle seat assembly (10) comprises a vehicle seat (1) having a seat (2) and a backrest (3), a plurality of vibrating devices (D1-D12, A1-A12), arranged in at least one one of the seat (2) and the backrest (3), the plurality of vibrating devices (D1-D12, A1-A12) being distributed in concentric subsets (SE1, SE2, SE3, SE4), and a unit control unit (12) configured to drive the vibrating devices (D1-D12, A1-Al2) by subsets (SE1, SE2, SE3, SE4).

Description

VEHICLE SEAT ASSEMBLY WITH VIBRATING DEVICES BY CONCENTRIC SQUS-ASSEMBLIES

Field of the invention

The present invention relates to a vehicle seat assembly comprising a seat provided with vibrating devices and a control unit for vibrating devices. The invention also relates to a driving assistance method using such a vehicle seat assembly.

Presentation of the prior art

It is known to provide a motor vehicle with different driving assistance functions. In particular, risk detection devices are commonly implemented on modern vehicles. It may in particular be a device for detecting a risk of collision with a vehicle traveling in front of the vehicle equipped with the device. Such a device can also be called an emergency brake warning device.

Different types of signals can be used to warn the driver of the vehicle. The most common are sound signals, for example the emission of pre-recorded voice messages or beeps, and / or light signals, for example the lighting of an indicator light, for example continuously or, on the contrary, flashing .

However, such signals can be difficult to perceive or recognize by the driver.

Warning lights, for example, are not always located in the driver's field of vision. More commonly, these indicators are displayed on the dashboard. Also, the driver, to realize that an alert is issued, must remove his gaze from the road, which can be dangerous and increases his reaction time to the alert.

In the case of audible signals in the form of beeps, the driver may not hear the signal immediately, in particular if the music system on board the vehicle or the GPS type voice guidance system is in operation.

Finally, the driver may also not hear a pre-recorded voice message. If he hears it, the driver must listen to the entire voicemail message to realize that a risk is involved and, possibly, to realize what a risk it is. Thus, the driver's reaction time is also relatively long.

Furthermore, a haptic alert wave generator is known in a vehicle seat. In this case, a seat is provided with four actuators in the form of electric motors causing an eccentric weight to rotate. Such a configuration does not make it possible to generate haptic signals easily identifiable by the driver of the vehicle occupying the seat. In addition, this configuration has a relatively large size.

Consequently, there remains a need for a vehicle seat assembly making it possible to warn its occupant of a risk determined by a driving assistance device, the assembly having a limited size and allowing the issuance of an alert. easily recognizable by the occupant so that he reacts as soon as possible. Summary of the invention To this end, the invention provides a vehicle seat assembly comprising: - a vehicle seat comprising a seat and a back, - a plurality of vibrating devices, arranged in at least one of the seat and backrest, the plurality of vibrating devices being distributed in concentric sub-assemblies, and - a control unit configured to control the vibrating devices by sub-assemblies. The invention thus relates to an alert system emitting a haptic signal. Indeed, it turns out that it is this type of signal that is most easily and quickly perceived by a user. Under these conditions, it is particularly advantageous to generate this haptic signal in a vehicle seat in which the driver is in contact with a large surface of the seat.

Indeed, it is thus possible to generate a wide variety of warning signals, in particular by adjusting the excitation scheme of the vibrating devices used.

In addition, surprisingly and after numerous tests, the inventors have found that a scheme of excitation of the vibrating devices, by concentric subsets, was the scheme which was most quickly and most effectively recognized by an occupant of the seat. Thus, it reacts as quickly as possible to this type of alert.

Preferably, the vehicle seat assembly according to the invention comprises one or more of the following characteristics, taken alone or in combination: - the control unit is configured to control the vibrating devices according to a variable amplitude and / or according to a variable frequency; - the control unit is configured to control the vibrating devices according to a sinusoidal setpoint; - the control unit is configured to sequentially control the vibrating devices by sub-assemblies; - the control unit is configured to control all the vibrating devices of the same sub-assembly according to the same instruction; - the set includes a single plurality of vibrating devices, arranged only in the seat or only in the backrest or in the seat; - The control unit is configured to control the vibrating devices of the plurality of vibrating devices, in subassemblies, so as to form a concentric wave extending outward or inward; - The assembly comprises a first plurality of vibrating devices arranged in the seat and a second plurality of vibrating devices arranged in the backrest, the first and second plurality of vibrating devices being respectively divided into concentric sub-assemblies, the unit of control being configured to control the vibrating devices of the first plurality of vibrating devices, on the one hand, and the vibrating devices of the second plurality of vibrating devices, on the other hand, by sub-assemblies, in particular sequentially by sub-assemblies ; the control unit is configured to receive information from at least one risk detection device, the at least one risk detection device preferably being chosen from: a device for detecting falling asleep d '' a driver, - an emergency braking alert device, - a re-engagement alert device in the case of an autonomous vehicle, - a lane departure detection device, - a device for detecting blind spot, and - a pedestrian detection device; and to control the vibrating devices by sub-assemblies, in particular sequentially, according to the information received; and - the assembly comprises at least ten vibrating devices, preferably at least five vibrating devices in the seat and at least five vibrating devices in the backrest, more preferably at least twelve vibrating devices in the seat and at least twelve devices vibrating in the backrest.

According to another aspect, the present invention relates to a method for assisting the driving of a driver seated in a vehicle seat of an assembly as described above, in all its combinations, the method comprising the steps consisting in: i) determining at least one risk by means of at least one risk detection device, ii) controlling, in particular sequentially, the devices vibrating in sub-assemblies, as a function of the information received from the at least one risk detection device.

According to an option, steps i) and ii) are implemented by the control unit, the control unit controlling the vibrating devices, in subassemblies, so as to form a concentric wave inward or toward outside.

Brief description of the figures Other aspects, objects and advantages of the invention will appear on reading the following description, with reference to the accompanying drawings in which: - Figure 1 is a schematic perspective view of a seat assembly of motor vehicle, and - Figures 2 to 4 illustrate excitation patterns of the vibrating devices of the seat of the seat assembly of Figure 1, with a scenario of approximation of the preceding vehicle.

detailed description

In the different figures, the same references designate identical or similar elements. For reasons of clarity of the presentation, certain elements may not be represented to scale.

In the following description, when reference is made to qualifiers of absolute position, such as the terms "front", "rear", "top", "bottom", "left", "right", etc., or relative, such as the terms "above", "below", "upper", "lower", etc., or to qualifiers of orientation, such as "horizontal", "vertical", etc., it is made reference, unless otherwise specified, to the orientation of the figures or of a seat in its normal position of use.

In particular, the longitudinal direction X means the longitudinal direction of the seat. The longitudinal direction of the seat is considered to be the same as the longitudinal direction of the motor vehicle in which the seat is mounted. This longitudinal direction X corresponds to the normal direction of advance of the vehicle. The transverse direction Y of the seat thus corresponds to the transverse or lateral direction of the motor vehicle. This transverse direction corresponds to a direction perpendicular to the normal direction of advance of the vehicle. The transverse direction Y is substantially horizontal. Finally, the vertical direction Z is a vertical direction of the seat, perpendicular to the longitudinal and transverse directions.

In Figure 1 is shown a driver seat 1 fitted to a vehicle marked Vehl in Figures 2 to 4). The seat includes a seat 2 connected to the vehicle floor by a system of slides and, where appropriate, other position adjustment devices, in particular for the height adjustment of the seat. The seat further comprises a backrest 3 rotatably mounted around a transverse axis Yl, relative to the seat 2. The inclination of the backrest 3 relative to the seat 2 can thus be adjusted in a manner known per se. . In the example of FIG. 1, a headrest 4 is also mounted on the backrest 3.

In Figure 1, the trim cover, that is to say the seat covering, is not shown.

In the example illustrated, the seat 1 comprises a plurality of vibrating devices Dl-D12, A1-A12. Here, the vibrating devices D1-D12, A1-A12 are arranged in the backrest 3 and in the seat 2. More specifically, a first plurality of vibrating devices D1-D12 is arranged in the backrest 3 and a second plurality of vibrating devices A1-A12 is arranged in seat 2.

More specifically, in the example illustrated, the vibrating devices D1-D12, A1-A12 are arranged in the back medallion and in the seat medallion, respectively, where an occupant of the seat is mainly supported on the seat . The vibrating devices D1-D12, A1-A12 can in particular be in the range / foam of the backrest 3, and of the seat 2, respectively. Alternatively, the vibrating devices D1-D12, A1-A12 are placed in the cover of the backrest 3 and of the seat 2, respectively. According to yet another option, the vibrating devices D1-D12, A1-A12 are placed respectively between the trim / foam of the backrest 3 and of the seat 2, on the one hand, and the respective cover of the backrest 3 and of the 'seat 2, on the other hand.

In the example illustrated, twelve vibrating devices D1-D12 are in folder 3 and twelve vibrating devices A1-A12 are in seat 2. These numbers are not, however, limiting. For example, the folder 3 can include at least five vibrating devices. Similarly, the seat 2 can include at least five vibrating devices. Advantageously, however, at least ten vibrating devices are arranged in the seat. Even more preferably, at least twelve vibrating devices are arranged in the seat and / or at least twelve vibrating devices are arranged in the backrest.

The vibrating devices D1-D12, A1-A12 are preferably electric, that is to say that they can vibrate when they are suitably supplied with an electric current. In particular, each vibrating device D1-D12, A1-A12 can be of the piezoelectric type. In this case, a piece of piezoelectric material from each vibrating device D1-D12, A1-A12 can be made to vibrate due to the power supply of the vibrating device D1-D12, A1-A12. Alternatively, the part in question may lengthen or on the contrary compress due to the power supply of the vibrating device D1-D12, A1-A12.

According to another possibility, each vibrating device D1-D12, A1-A12 is of the magnetic type. In particular, each vibrating device D1-D12, A1-A12 can be formed by an electromagnet. In this case, each vibrating device D1-D12, A1-A12 comprises a solenoid supplied with current and a piston made of magnetic material inside the solenoid, so that the current supply of the solenoid causes a movement of the piston alternately one way and the other. Other embodiments of the vibrating devices D1-D12, A1-A12 are accessible to those skilled in the art.

Advantageously, here, the vibrating devices D1-D12, A1-A12 are distributed regularly in the backrest 3, on the one hand, and in the seat 2, on the other hand. This gives a first matrix of vibrating devices D1-D12 in the backrest, and a second matrix of vibrating devices A1-A12 in the seat. Here, each matrix of vibrating devices D1-D12, A1-A12 comprises four rows of three vibrating devices (or three columns of four vibrating devices).

In file 3, we can thus distinguish here a first subset SE1 of vibrating devices, comprising the vibrating devices D5, D8, located in the center of the first matrix. We can also distinguish a second subset SE2 of vibrating devices, comprising the vibrating devices D1-D4, D6, D7, D9-D12 located on the edge of the first matrix of vibrating devices D1-D12. As can be seen in FIG. 1, the two subsets SE1, SE2 are included in respective bands B1, B2. The bands B1, B2 are concentric, so that the subsets SE1, SE2 are also concentric. Here, these bands B1, B2 are of substantially rectangular shape.

Similarly, in seat 2, we can also distinguish a first subset SE3 of vibrating devices, comprising the vibrating devices A5, A8, located in the center of the second matrix of vibrating devices. We can also distinguish a second subset SE4 of vibrating devices, comprising the vibrating devices A1-A4, A6, A7, A9-A12 located on the edge of the second matrix A1-A12. As can be seen in FIG. 1, in particular, the two sub-assemblies SE3, SE4 are included in respective bands B3, B4. The bands B3, B4 are concentric so that the subsets SE3, SE4 are also concentric. As illustrated, the bands B3, B4 are of substantially rectangular shape.

Furthermore, the seat 1 is associated, in a vehicle seat assembly 10, with a control unit 12. The control unit 12 is for example an electronic control unit.

This control unit 12 can be integrated into the seat 1. In this case, the control unit 12 can be specific to the seat 1 and to the control of the vibrating devices, in particular.

Alternatively, however, as illustrated in FIG. 1, the control unit 12 is arranged outside the seat 1. In this case, the control unit 12 is for example placed in the dashboard of the motor vehicle equipped of the seat 1, under the floor, under the seat 1 or at any other place of the motor vehicle equipped with the seat 1. In this case, the control unit 12 can be a control unit adapted to control other functions of the vehicle automobile. The control unit 12 can control the vibrating devices D1-D12, A1-A12, using wireless communication, in particular via Bluetooth. This is particularly advantageous in the case where the control unit 12 is outside the seat 1. Alternatively, the control unit 12 is functionally connected to the various vibrating devices D1-D12, A1-A12 by wire connections, preferably by separate wire connections. The connections between the control unit 12 and the vibrating devices Dl-D12, A1-A12 can also be grouped by sub-assemblies SE1, SE2, SE3, SE4. The control unit is configured to control the vibrating devices D1-D12, Al-A12, by subassemblies. In particular, the control unit 12 can be configured to control the devices vibrating sequentially by sub-assembly. In this case, for example, the control unit 12 controls the vibrating devices of a first sub-assembly SE1, SE2, SE3, SE4, while the vibrating devices of the other sub-assemblies SE1, SE2, SE3, SE4 are at rest, then the vibrating devices of a second sub-assembly another SE1, SE2, SE3, SE4, while the vibrating devices of the other sub-assemblies SE1, SE2, SE3, SE4 are at rest, and so on.

In the case of FIG. 1, the control unit 12 can be configured to control the vibrating devices D1-D12 in the backrest 3 independently of the vibrating devices A1-A12 in the seat 2. In this case, the command 12 successively controls the vibrating devices of the first sub-assembly SE1 then of the second sub-assembly SE2 in the backrest and, independently, the vibrating devices of the first sub-assembly SE3 then of the second sub-assembly SE4 in the seat 2. Thus, the control unit 12 can control the vibrating devices of the first sub-assemblies SE1, SE3, in the backrest and in the seat, firstly, then the vibrating devices of the second sub-assemblies SE2, SE4, in a second time. The control unit 12 can control all the vibrating devices of the same sub-assembly SE1, SE2, SE3, SE4 according to the same setpoint.

Advantageously, the control unit 12 controls the vibrating devices according to a setpoint having a variable amplitude and / or frequency. In this case, the amplitude and / or the frequency of vibration of the vibrating devices can be a function of the level of risk determined by a risk detection device.

In particular, the vibration frequency of the vibrating devices D1-D12, A1-A12 can be between 50 Hz and 500 Hz, preferably between 50 Hz and 200 Hz. The amplitude of vibration of the vibrating devices D1-D12, A1-A12 may be greater than or equal to 1 µm, preferably greater than or equal to 1 mm, and / or less than or equal to 1 cm, preferably less than or equal to 5 mm. The control unit 12 can receive from one or more risk detection device 14, a setpoint or information according to which it controls the vibrating devices. The risk detection device or devices can in particular determine at least one of the following risks: - a driver falling asleep, - a collision with the vehicle preceding the vehicle equipped with the seat 1, which may require braking emergency on the part of the driver, - a need for re-engagement, in the case of an autonomous vehicle, that is to say that the driver must start driving again the vehicle which was previously in autonomous mode, - a crossing line, - a vehicle in a blind spot, and - a pedestrian crossing in front of the vehicle or behind the vehicle during a maneuver.

Such devices are known. They are therefore not described in more detail here, for the sake of brevity of the present description. The control unit 12 can in particular control each vibrating device according to a sinusoidal law of vibration, the amplitude and the pulsation of which can be variable as explained above. The setpoint phase can be the same for all vibrating devices of the same sub-assembly, controlled simultaneously. Alternatively, the instructions of the different vibrating devices of the same sub-assembly can be phase-shifted. In particular, all the phases of all the setpoints for the same sub-assembly can be different.

Figures 2 to 4 illustrate an example of implementation of the seat assembly 10 illustrated in Figure 1, associated with a device for detecting a risk of collision with a vehicle Veh2 preceding the Vehl vehicle equipped with the assembly seat 10.

Initially, when the distance between the Vehl vehicle equipped with the seat assembly 10 and the vehicle Veh2 immediately ahead is sufficiently large, the device for detecting a risk of collision does not issue any instruction to the control unit 12d '' issue an alert signal. In this case, all the vibrating devices D1-D12, A1-A12 are for example at rest.

In FIG. 2, the distance dl between the vehicles Vehl, Veh2 becomes slightly too small, taking into account the difference between the respective speeds Vil and V21 of the vehicles Vehl, Veh2. In this case, the collision risk detection device sends to the control unit 12 a resignation instruction for a weak alert signal. In response, according to the example of FIG. 2, the control unit 12 controls the vibrating devices D5, D8, A5, A8 of the first sub-assemblies SE1, SE3 of the backrest 3 and of the seat 2, respectively. Consequently, these vibrating devices D5, D8, A5, A8 are vibrated according to a setpoint having a relatively low amplitude and / or frequency. For this reason, the vibrating devices D5, D8, A5, A8 are grayed out in FIG. 2. As long as the vibrating devices D5, D8, A5, A8 of the first subsets SE1, SE3 of the backrest 3 and of the seat 2 , respectively, are controlled by the control unit 12, the other vibrating devices of the second sub-assemblies SE2, SE4 of the backrest 3 and of the seat 2, respectively, are at rest.

Then, as visible in FIG. 3, the Vehl vehicle is closer to the vehicle Veh2 so that the distance d2 between these vehicles becomes too small taking into account their respective speeds V12, V22. In this case, the collision risk detection device issues a command to the control unit 12 so that the latter emits a higher alarm signal. This then results in the control, by the electronic unit of the vibrating devices of the second sub-assemblies SE2, SE4 of the backrest 3 and of the seat 2, respectively, while the vibrating devices of the first sub-assemblies SE1, SE3 of the backrest 3 and seat 2, respectively, are put to rest. In FIG. 3, the vibrating devices of the second sub-assemblies SE2, SE4 of the backrest 3 and of the seat 2 are blackened. This aims to represent that advantageously, the control setpoint of these vibrating devices has a higher amplitude and / or frequency than in the case of the setpoint of the vibrating devices of the first subsets SE1, SE3 of the file 3 and of the 'sitting2, in the case of figure 2.

Finally, when the distance d3 between the Vehl vehicles, Veh2 becomes clearly insufficient in view of the speeds V13, V23 of these Vehl vehicles, Veh2, the device for detecting a risk of collision sends an instruction to the control unit 12 of such that the latter again controls the vibrating devices of the first sub-assemblies SE1, SE3, the vibrating devices of the second sub-assemblies SE2, SE4 being put to rest. Again, the amplitude and / or the frequency of the vibration setpoint can be increased relative to the amplitude, respectively the frequency, of the prior vibration setpoint of the vibrating devices of the second subsets SE2, SE4.

Thus, according to the degree of collision risk determined by the collision risk detection device, the control unit 12 successively controls the first and second subsets of vibrating devices. Here, this control of the first and second subsets is thus alternative since there are only two subsets of vibrating device in the backrest and in the seat, respectively. Thus, when the vibrating devices of the first subsets are put into vibration, those of the second subsets are put to rest, and vice versa. Advantageously, the control unit emits a single instruction for each of the vibrating devices of these subsets. Also advantageously, the amplitude and / or the frequency of this single instruction increases with the degree of collision risk determined by the collision risk detection device. The control unit is thus configured to control the vibrating devices so as to form a concentric wave pattern propagating inward or outward, that is to say a pattern or an excitation sequence. devices vibrating either from a central band to a peripheral band, or from a peripheral band to a central band. The vibrating devices thus advantageously form a wave propagating in a manner analogous to the propagation of the waves created by the fall of a drop of water in a plane of water with a flat surface. The invention is not limited to the single example described above but is, on the contrary, capable of numerous variants accessible to those skilled in the art.

For example, the different vibrating devices of the same sub-assembly SE1, SE2, SE3, SE4 can be controlled by the control unit 12 according to different setpoints, in particular according to phase-shifted setpoints, when the vibrating devices of the other under -sets are at rest.

In the example described, the first and second subsets are sequentially (and therefore selectively) controlled as a function of the increased risk of collision. However, the control unit 12 can successively and cyclically control the first and then the second subsets of devices, during a period, depending on the degree of risk of collision. In this case, an increase in the risk of collision determined by the device for detecting a risk of collision can result, in addition to the possible increase in the amplitude and / or the frequency of the setpoint emitted by the control unit, by reducing the piloting period of the vibrating devices of the first and second sub-assemblies SE1, SE2, SE3, SE4. The piloting period of the first and second subsets can then be between 0 and 1 s.

Thus, in general, the excitation of the vibrating devices can be done in the form of predetermined sequences for example: i) selectively exciting a first subset of the plurality of vibrating devices, ii) then sequentially selectively exciting another sub-assembly of the plurality of vibrating devices, the sub-assemblies here being concentric. Also, in the example illustrated, the concentric bands in which the vibrating device sub-assemblies are arranged are rectangular. However, other forms of these bands can be imagined. These bands may in particular be circular, square, polygonal, in particular star-shaped.

Finally, in the example described, the vibrating devices of the backrest and those of the seat were considered to be part of two sets (or plurality) of distinct vibrating devices. It is however possible to consider these different vibrating devices as a single whole (or plurality). In this case, it is this unique set of vibrating device that should be divided into concentric subsets. A central sub-assembly can then include, for example, the vibrating devices D5, D8, Dll, A2, A5, A8, and a peripheral sub-assembly can then include the other vibrating devices.

Finally, the control unit can also be configured to control the vibrating devices so as to form a concentric wave pattern propagating inward or outward, that is to say a pattern or a sequence. excitation of vibrating devices either from a central band to a peripheral band, or from a peripheral band to a central band, forming a wave propagating in a manner analogous to the propagation of the waves created by the fall of a drop of water in a plane surface water body, by choosing the phase difference between the instructions of the vibrating devices of the different sub-assemblies. In particular, the setpoints can then be identical between all the vibrating devices, only the setpoint phase varying from a sub-assembly to its neighbor. In this case, the instructions can in particular be sinusoidal.

Claims (12)

1. Vehicle seat assembly (10) comprising: a vehicle seat (1) comprising a seat (2) and a backrest (3), a plurality of vibrating devices (D1-D12, A1-A12), arranged in at at least one of the seat (2) and the backrest (3), the plurality of vibrating devices (D1-D12, Al-A12) being distributed in concentric sub-assemblies (SE1, SE2, SE3, SE4), and a control unit (12) configured to control the vibrating devices (Dl-D12, A1-A12) by sub-assemblies (SE1, SE2, SE3, SE4). 2. Assembly according to claim 1, in which the control unit (12) is configured to control the vibrating devices (D1-D12, A1-A12) according to a variable amplitude and / or according to a variable frequency. 3. The assembly of claim 1 or 2, wherein the control unit (12) is configured to control the vibrating devices (D1-D12, A1-A12) according to a sinusoidal setpoint. 4. Assembly according to one of claims 1 to 3, in which the control unit (12) is configured to sequentially control the vibrating devices (D1-D12, A1-A12) by subassemblies (SE1, SE2, SE3 , SE4). 5. Assembly according to any one of claims 1 to 4, in which the control unit (12) is configured to drive all the vibrating devices (D1-D12, A1-A12) of the same sub-assembly (SE1 , SE2, SE3, SE4) according to the same setpoint. 6. Assembly according to any one of the preceding claims comprising a single plurality of vibrating devices (D1-D12, A1-A12), arranged only in the seat (2) or only in the backrest (3) or in the seat ( 1). 7. The assembly as claimed in claim 6, in which the control unit (12) is configured to control the vibrating devices (D1-D12, A1-A12) of a plurality of vibrating devices (D1-D12, A1-A12), by sub-assemblies, so as to form a concentric wave extending outward or inward. 8. An assembly according to any one of claims 1 to 5, comprising a first plurality of vibrating devices (A1-A12) arranged in the seat (2) and a second plurality of vibrating devices (D1-D12) arranged in the backrest (3 ), the first and second plurality of vibrating devices (A1-A12, D1-D12) being respectively divided into concentric sub-assemblies (SE1, SE2; SE3; SE4), the control unit (12) being configured to control the vibrating devices (A1-A12) of the first plurality of vibrating devices, on the one hand, and the vibrating devices (D1-D12) of the second plurality of vibrating devices, on the other hand, by subassemblies, in particular sequentially by subsets. 9. Assembly according to any one of the preceding claims, in which the control unit (12) is configured to receive information from at least one risk detection device (14), the at least one risk detection device. risk (14) being preferably chosen from: a device for detecting a driver falling asleep, an emergency braking alert device, a re-engagement alert device in the case of an autonomous vehicle, a line crossing detection device, a blind spot detection device, and a pedestrian detection device; and to control the vibrating devices (D1-D12, A1-A12) by sub-assemblies (SE1, SE2, SE3, SE4), in particular sequentially, according to the information received. 10. Assembly according to any one of the preceding claims, comprising at least ten vibrating devices, preferably at least five vibrating devices in the seat (2) and at least five vibrating devices in the backrest (3), more preferably at least twelve vibrating devices in the seat (2) and at least twelve vibrating devices in the backrest (3). 11. Method for assisting in driving a vehicle (Vehl) of a driver seated in a vehicle seat (1) of an assembly (10) according to any one of the preceding claims, the method comprising the steps consisting in: : i) determine at least one risk by means of at least one risk detection device, ii) control, in particular sequentially, the vibrating devices (D1-D12, A1-A12) by sub-assemblies, according to the information received from the at least one risk detection device. 12. The method of claim 11, wherein steps i) and ii) are implemented by the control unit (12), the control unit (12) driving the vibrating devices (D1-D12, A1- A12), in sub-assemblies, so as to form a concentric wave inwards or outwards.